French Guiana has no official flag, with the national French flag used when a flag is needed to represent it either as an overseas region or an department of France. A widely used unofficial flag consists of two triangles, colored green in the upper fly and yellow lower hoist, with a red star in the centre. French Guiana has no official flag, with the national French flag used when a flag is needed to represent it either as an overseas region or an department of France. Green would represent forests, yellow represents minerals such as gold, while the red star represents either blood or socialism.